Liquid-feed system



Nov. 19, 1929. c. STOKES LIQUID FEED SYSTEM IN V EN TOR.

Filed Dz ao. 5, 1923 I of 17 through 18, and 14 willalso rise a pre- 2 determined distance in 1 due to its increased buoyancy by releasing the weight of 17 therefrom.

tinuously with fuel during both the pumping and dumping periods, during each suction period when liquid "fuel is being drawn in through 4, the liquid within 17 will be flowing through 18 to feed the carburetor,--because the interior of V 17:;is open to atmosphere through 22, and 17 is so designed to take care of this effect.

Consequently, when 1 becomes full, 17 is also filled and 1 thenbecomes'a reservoir'for liquid fuel to be supplied to the engine at such critical periods of engine operation as when the vacuum being applied to 29 is insuflicient to raise fuel to l from a low level, the

fuel being. released from 1 at this critical 17 and thereafter the admission of .air

through 22, 17 and 18 tothe interior of 8,

. "when the same passes up'around the stem 18' and "is of'sufficient volume to break the to'the carburetor.

very light vacuum "then being applied through 29 so that the liquidinl. feed The alternative shown in Fig. 3 functions 'in a similar'manner to permit the fuel in 1 to be discharged therefrom under conditions of low vacuum when liquid fuel cannot be I liftedthereto. v q 1A fitting 25'is' threaded into. 6 andcontains a central boss27 through which .40

is closed by a check valve 26.

The check valve 26 opens and closes by the I alternationof'suction and atmospheric pres- [sure inthe well knownr'nanner and a" small I 7 hole 28 isprovided in 25,wher'eby when the liquid in 17 is exhausted, atmosphere may be 'admittedthrough 22, 17, 18,. and 28, to the interior of 1 forjbreaking the low vacuum' being applied through 29, but in both illus *trationsthe amount of air'admitted to 1 through28in Fig; 3,'or around 18 in Fig. 1, I is insuflicient to aflectthe pumping efficiency a of l under high vacuum; It may benot-ed that the surfaces of 16, -16 "and 17 maybe rough- 5 i cried, 'or corrugated to ensure a good gri I Iclaim; I

ing liquidfuehja port for supplying a1r, a

port for discharging liquid fuel, afloat in the chamber, and means including mechanism actuated by the pressure in the ichamberxfor creating alternations'offvacuum and atmos-j I ,tion of pressure .w1th1nsa1d reoeptacle'for opening said airinlet valve when the liquid pheric pressure in thejchamber, 1 h a v 2."A vacuum tankiinoluding a main cham 'slidesand ber having a port for applying suction con- .tinuously to said chamber, a port for supply ing liquid fuel, a port for supplying air, a port for discharging liquid fuel, a float in the chamber, and means actuated by pressure in said main chamber and associated with the float for creating alternations of vacuum and atmospheric pressurein the chamber.

8. A vacuum tank including a main chamher having a port for applying suction to said chamber, a port for supplyingliquid fuel, a port-for supplying air, a port for discharging liquidfuel, a float in the chamber, "a movable receptacle in the chamber communicating at its lower end with; the liquid discharge port,-a valve associated with the receptacle for-opening and closing said 'air port upon movement of the receptacle, and, means actuated by'the pressure within said chamber and associated with the float for causing the float to move said receptacle and; opensaid Iair port when suction is applied to said chamv 4. A vacuum tank-including a main champeriod by the exhaustion of the fuel within bervwith suction, air and fuel ports, and a floatin the chamber having a portion responsive to the pressure within the main chamber for controlling the supply of air and liquid fuel through said ports, said suction port remaining constantly open.

5. 'A' vacuum tan for the fuel feeding system of an internal combustion engine, including a main chamber having aport through which the suction of the engine is applied, a-

port for supplying liquid fuel, a'port' for supplying air, a port for discharging liquid.

fuel, a float in the chamber, a hollow guide for the float, and means of discharging liquid 6. Ina fuel feeding system for internal combustion engines, a'receptacle for liquid fuelhaving an air inlet, a permanently open suction port, a valve for said inlet, and means compr sing a pressurecontrolled devicefor ed withv an air intake port, acvalve for said port and a guide for said.valve, said guide be ing provided with an opening e'xtendinglongitudinallythereof for supplying air at at-Iw:

' 8. Inavfuel feeding system for, internal combustion engines, a'receptacle for'liquid V fuel, said receptacle being provided; with an air 'inlet port, a permanently open air ex haust'port, and a fuel inlet portpvalves for said fuel and air inlet ports, and means ineluding mechanism controlled by the variafuelfrom the guide during the application "of engine suction to the chamber. i w

said receptacle, said receptacle being provid i mospherlc pressure to said chamber. v

Within said receptacle rises above a prede termined level. a I

9. In a fuel feeding system for internal combustion engines, a vacuum tank comprising a receptacle'having an air inlet, a valve for said inlet, means for operating said valve, said means comprising a float and a pressure controlled device for gripping, with said I float for operating saidvalve. V Signed at Wilmington; in the county of Los Angeles and State of California, this 6th day of November ADD. 1923 v CHARLES LAWRENCE STOKES.

CERTIFICATE OF CORRECTION.

Patent No. 1,736,100. Granted November 19, 1929 to CHARLES LAWRENCE STOKES.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, line 65, for the word-"side" read "size"; page 3, line 8, claim 9, strike out the word "with" and the comma immediately preceding it; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. I

Signed and sealed this 31st day of December, A. D. 1929.

- M. J. Moore, (Seal) Acting Commissioner of Patents. 

